blob: 636eed9de9125cb66f2490992fdbf2c8008f8fd5 [file] [log] [blame]
Simon Glass1a736612016-02-29 15:25:39 -07001/*
2 * (C) Copyright 2000-2004
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#ifndef BLK_H
9#define BLK_H
10
Peter Jonesff98cb92017-09-13 18:05:25 -040011#include <efi.h>
12
Simon Glass1a736612016-02-29 15:25:39 -070013#ifdef CONFIG_SYS_64BIT_LBA
14typedef uint64_t lbaint_t;
15#define LBAFlength "ll"
16#else
17typedef ulong lbaint_t;
18#define LBAFlength "l"
19#endif
20#define LBAF "%" LBAFlength "x"
21#define LBAFU "%" LBAFlength "u"
22
23/* Interface types: */
Simon Glass5ec4f1a2016-02-29 15:25:40 -070024enum if_type {
25 IF_TYPE_UNKNOWN = 0,
26 IF_TYPE_IDE,
27 IF_TYPE_SCSI,
28 IF_TYPE_ATAPI,
29 IF_TYPE_USB,
30 IF_TYPE_DOC,
31 IF_TYPE_MMC,
32 IF_TYPE_SD,
33 IF_TYPE_SATA,
34 IF_TYPE_HOST,
Zhikang Zhangffab6942017-08-03 02:30:56 -070035 IF_TYPE_NVME,
Heinrich Schuchardt05ef48a2018-01-21 19:29:30 +010036 IF_TYPE_EFI,
Simon Glass5ec4f1a2016-02-29 15:25:40 -070037
38 IF_TYPE_COUNT, /* Number of interface types */
39};
Simon Glass1a736612016-02-29 15:25:39 -070040
Bin Mengeb81b1a2017-09-10 05:12:50 -070041#define BLK_VEN_SIZE 40
42#define BLK_PRD_SIZE 20
43#define BLK_REV_SIZE 8
44
Simon Glass09d71aa2016-02-29 15:25:55 -070045/*
Peter Jonesff98cb92017-09-13 18:05:25 -040046 * Identifies the partition table type (ie. MBR vs GPT GUID) signature
47 */
48enum sig_type {
49 SIG_TYPE_NONE,
50 SIG_TYPE_MBR,
51 SIG_TYPE_GUID,
52
53 SIG_TYPE_COUNT /* Number of signature types */
54};
55
56/*
Simon Glass09d71aa2016-02-29 15:25:55 -070057 * With driver model (CONFIG_BLK) this is uclass platform data, accessible
58 * with dev_get_uclass_platdata(dev)
59 */
Simon Glass1a736612016-02-29 15:25:39 -070060struct blk_desc {
Simon Glass09d71aa2016-02-29 15:25:55 -070061 /*
62 * TODO: With driver model we should be able to use the parent
63 * device's uclass instead.
64 */
Simon Glass5ec4f1a2016-02-29 15:25:40 -070065 enum if_type if_type; /* type of the interface */
Simon Glassbcce53d2016-02-29 15:25:51 -070066 int devnum; /* device number */
Simon Glass1a736612016-02-29 15:25:39 -070067 unsigned char part_type; /* partition type */
68 unsigned char target; /* target SCSI ID */
69 unsigned char lun; /* target LUN */
70 unsigned char hwpart; /* HW partition, e.g. for eMMC */
71 unsigned char type; /* device type */
72 unsigned char removable; /* removable device */
73#ifdef CONFIG_LBA48
74 /* device can use 48bit addr (ATA/ATAPI v7) */
75 unsigned char lba48;
76#endif
77 lbaint_t lba; /* number of blocks */
78 unsigned long blksz; /* block size */
79 int log2blksz; /* for convenience: log2(blksz) */
Bin Mengeb81b1a2017-09-10 05:12:50 -070080 char vendor[BLK_VEN_SIZE + 1]; /* device vendor string */
81 char product[BLK_PRD_SIZE + 1]; /* device product number */
82 char revision[BLK_REV_SIZE + 1]; /* firmware revision */
Peter Jonesff98cb92017-09-13 18:05:25 -040083 enum sig_type sig_type; /* Partition table signature type */
84 union {
85 uint32_t mbr_sig; /* MBR integer signature */
86 efi_guid_t guid_sig; /* GPT GUID Signature */
87 };
Simon Glassc4d660d2017-07-04 13:31:19 -060088#if CONFIG_IS_ENABLED(BLK)
Simon Glassb6694a32016-05-01 13:52:33 -060089 /*
90 * For now we have a few functions which take struct blk_desc as a
91 * parameter. This field allows them to look up the associated
92 * device. Once these functions are removed we can drop this field.
93 */
Simon Glass09d71aa2016-02-29 15:25:55 -070094 struct udevice *bdev;
95#else
Simon Glass1a736612016-02-29 15:25:39 -070096 unsigned long (*block_read)(struct blk_desc *block_dev,
97 lbaint_t start,
98 lbaint_t blkcnt,
99 void *buffer);
100 unsigned long (*block_write)(struct blk_desc *block_dev,
101 lbaint_t start,
102 lbaint_t blkcnt,
103 const void *buffer);
104 unsigned long (*block_erase)(struct blk_desc *block_dev,
105 lbaint_t start,
106 lbaint_t blkcnt);
107 void *priv; /* driver private struct pointer */
Simon Glass09d71aa2016-02-29 15:25:55 -0700108#endif
Simon Glass1a736612016-02-29 15:25:39 -0700109};
110
111#define BLOCK_CNT(size, blk_desc) (PAD_COUNT(size, blk_desc->blksz))
112#define PAD_TO_BLOCKSIZE(size, blk_desc) \
113 (PAD_SIZE(size, blk_desc->blksz))
114
Eric Nelsone40cf342016-03-28 10:05:44 -0700115#ifdef CONFIG_BLOCK_CACHE
116/**
117 * blkcache_read() - attempt to read a set of blocks from cache
118 *
119 * @param iftype - IF_TYPE_x for type of device
120 * @param dev - device index of particular type
121 * @param start - starting block number
122 * @param blkcnt - number of blocks to read
123 * @param blksz - size in bytes of each block
124 * @param buf - buffer to contain cached data
125 *
126 * @return - '1' if block returned from cache, '0' otherwise.
127 */
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700128int blkcache_read(int iftype, int dev,
129 lbaint_t start, lbaint_t blkcnt,
130 unsigned long blksz, void *buffer);
Eric Nelsone40cf342016-03-28 10:05:44 -0700131
132/**
133 * blkcache_fill() - make data read from a block device available
134 * to the block cache
135 *
136 * @param iftype - IF_TYPE_x for type of device
137 * @param dev - device index of particular type
138 * @param start - starting block number
139 * @param blkcnt - number of blocks available
140 * @param blksz - size in bytes of each block
141 * @param buf - buffer containing data to cache
142 *
143 */
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700144void blkcache_fill(int iftype, int dev,
145 lbaint_t start, lbaint_t blkcnt,
146 unsigned long blksz, void const *buffer);
Eric Nelsone40cf342016-03-28 10:05:44 -0700147
148/**
149 * blkcache_invalidate() - discard the cache for a set of blocks
150 * because of a write or device (re)initialization.
151 *
152 * @param iftype - IF_TYPE_x for type of device
153 * @param dev - device index of particular type
154 */
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700155void blkcache_invalidate(int iftype, int dev);
Eric Nelsone40cf342016-03-28 10:05:44 -0700156
157/**
158 * blkcache_configure() - configure block cache
159 *
160 * @param blocks - maximum blocks per entry
161 * @param entries - maximum entries in cache
162 */
163void blkcache_configure(unsigned blocks, unsigned entries);
164
165/*
166 * statistics of the block cache
167 */
168struct block_cache_stats {
169 unsigned hits;
170 unsigned misses;
171 unsigned entries; /* current entry count */
172 unsigned max_blocks_per_entry;
173 unsigned max_entries;
174};
175
176/**
177 * get_blkcache_stats() - return statistics and reset
178 *
179 * @param stats - statistics are copied here
180 */
181void blkcache_stats(struct block_cache_stats *stats);
182
183#else
184
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700185static inline int blkcache_read(int iftype, int dev,
186 lbaint_t start, lbaint_t blkcnt,
187 unsigned long blksz, void *buffer)
Eric Nelsone40cf342016-03-28 10:05:44 -0700188{
189 return 0;
190}
191
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700192static inline void blkcache_fill(int iftype, int dev,
193 lbaint_t start, lbaint_t blkcnt,
194 unsigned long blksz, void const *buffer) {}
Eric Nelsone40cf342016-03-28 10:05:44 -0700195
Eric Nelsonc8e4d2a2016-04-02 07:37:14 -0700196static inline void blkcache_invalidate(int iftype, int dev) {}
Eric Nelsone40cf342016-03-28 10:05:44 -0700197
198#endif
199
Simon Glassc4d660d2017-07-04 13:31:19 -0600200#if CONFIG_IS_ENABLED(BLK)
Simon Glass09d71aa2016-02-29 15:25:55 -0700201struct udevice;
202
203/* Operations on block devices */
204struct blk_ops {
205 /**
206 * read() - read from a block device
207 *
208 * @dev: Device to read from
209 * @start: Start block number to read (0=first)
210 * @blkcnt: Number of blocks to read
211 * @buffer: Destination buffer for data read
212 * @return number of blocks read, or -ve error number (see the
213 * IS_ERR_VALUE() macro
214 */
215 unsigned long (*read)(struct udevice *dev, lbaint_t start,
216 lbaint_t blkcnt, void *buffer);
217
218 /**
219 * write() - write to a block device
220 *
221 * @dev: Device to write to
222 * @start: Start block number to write (0=first)
223 * @blkcnt: Number of blocks to write
224 * @buffer: Source buffer for data to write
225 * @return number of blocks written, or -ve error number (see the
226 * IS_ERR_VALUE() macro
227 */
228 unsigned long (*write)(struct udevice *dev, lbaint_t start,
229 lbaint_t blkcnt, const void *buffer);
230
231 /**
232 * erase() - erase a section of a block device
233 *
234 * @dev: Device to (partially) erase
235 * @start: Start block number to erase (0=first)
236 * @blkcnt: Number of blocks to erase
237 * @return number of blocks erased, or -ve error number (see the
238 * IS_ERR_VALUE() macro
239 */
240 unsigned long (*erase)(struct udevice *dev, lbaint_t start,
241 lbaint_t blkcnt);
Simon Glasscd0fb552016-05-01 13:52:30 -0600242
243 /**
244 * select_hwpart() - select a particular hardware partition
245 *
246 * Some devices (e.g. MMC) can support partitioning at the hardware
247 * level. This is quite separate from the normal idea of
248 * software-based partitions. MMC hardware partitions must be
249 * explicitly selected. Once selected only the region of the device
250 * covered by that partition is accessible.
251 *
252 * The MMC standard provides for two boot partitions (numbered 1 and 2),
253 * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
254 *
255 * @desc: Block device to update
256 * @hwpart: Hardware partition number to select. 0 means the raw
257 * device, 1 is the first partition, 2 is the second, etc.
258 * @return 0 if OK, -ve on error
259 */
260 int (*select_hwpart)(struct udevice *dev, int hwpart);
Simon Glass09d71aa2016-02-29 15:25:55 -0700261};
262
263#define blk_get_ops(dev) ((struct blk_ops *)(dev)->driver->ops)
264
265/*
266 * These functions should take struct udevice instead of struct blk_desc,
267 * but this is convenient for migration to driver model. Add a 'd' prefix
268 * to the function operations, so that blk_read(), etc. can be reserved for
269 * functions with the correct arguments.
270 */
271unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start,
272 lbaint_t blkcnt, void *buffer);
273unsigned long blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
274 lbaint_t blkcnt, const void *buffer);
275unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start,
276 lbaint_t blkcnt);
277
278/**
Simon Glass61392812017-04-23 20:02:05 -0600279 * blk_find_device() - Find a block device
280 *
281 * This function does not activate the device. The device will be returned
282 * whether or not it is activated.
283 *
284 * @if_type: Interface type (enum if_type_t)
285 * @devnum: Device number (specific to each interface type)
286 * @devp: the device, if found
287 * @return 0 if found, -ENODEV if no device found, or other -ve error value
288 */
289int blk_find_device(int if_type, int devnum, struct udevice **devp);
290
291/**
Simon Glass09d71aa2016-02-29 15:25:55 -0700292 * blk_get_device() - Find and probe a block device ready for use
293 *
294 * @if_type: Interface type (enum if_type_t)
295 * @devnum: Device number (specific to each interface type)
296 * @devp: the device, if found
Simon Glass61392812017-04-23 20:02:05 -0600297 * @return 0 if found, -ENODEV if no device found, or other -ve error value
Simon Glass09d71aa2016-02-29 15:25:55 -0700298 */
299int blk_get_device(int if_type, int devnum, struct udevice **devp);
300
301/**
302 * blk_first_device() - Find the first device for a given interface
303 *
304 * The device is probed ready for use
305 *
306 * @devnum: Device number (specific to each interface type)
307 * @devp: the device, if found
308 * @return 0 if found, -ENODEV if no device, or other -ve error value
309 */
310int blk_first_device(int if_type, struct udevice **devp);
311
312/**
313 * blk_next_device() - Find the next device for a given interface
314 *
315 * This can be called repeatedly after blk_first_device() to iterate through
316 * all devices of the given interface type.
317 *
318 * The device is probed ready for use
319 *
320 * @devp: On entry, the previous device returned. On exit, the next
321 * device, if found
322 * @return 0 if found, -ENODEV if no device, or other -ve error value
323 */
324int blk_next_device(struct udevice **devp);
325
326/**
327 * blk_create_device() - Create a new block device
328 *
329 * @parent: Parent of the new device
330 * @drv_name: Driver name to use for the block device
331 * @name: Name for the device
332 * @if_type: Interface type (enum if_type_t)
Simon Glass52138fd2016-05-01 11:36:28 -0600333 * @devnum: Device number, specific to the interface type, or -1 to
334 * allocate the next available number
Simon Glass09d71aa2016-02-29 15:25:55 -0700335 * @blksz: Block size of the device in bytes (typically 512)
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200336 * @lba: Total number of blocks of the device
Simon Glass09d71aa2016-02-29 15:25:55 -0700337 * @devp: the new device (which has not been probed)
338 */
339int blk_create_device(struct udevice *parent, const char *drv_name,
340 const char *name, int if_type, int devnum, int blksz,
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200341 lbaint_t lba, struct udevice **devp);
Simon Glass09d71aa2016-02-29 15:25:55 -0700342
343/**
Simon Glass9107c972016-05-01 11:36:29 -0600344 * blk_create_devicef() - Create a new named block device
345 *
346 * @parent: Parent of the new device
347 * @drv_name: Driver name to use for the block device
348 * @name: Name for the device (parent name is prepended)
349 * @if_type: Interface type (enum if_type_t)
350 * @devnum: Device number, specific to the interface type, or -1 to
351 * allocate the next available number
352 * @blksz: Block size of the device in bytes (typically 512)
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200353 * @lba: Total number of blocks of the device
Simon Glass9107c972016-05-01 11:36:29 -0600354 * @devp: the new device (which has not been probed)
355 */
356int blk_create_devicef(struct udevice *parent, const char *drv_name,
357 const char *name, int if_type, int devnum, int blksz,
Jean-Jacques Hiblot5fe77022017-06-09 16:45:18 +0200358 lbaint_t lba, struct udevice **devp);
Simon Glass9107c972016-05-01 11:36:29 -0600359
360/**
Simon Glass09d71aa2016-02-29 15:25:55 -0700361 * blk_prepare_device() - Prepare a block device for use
362 *
363 * This reads partition information from the device if supported.
364 *
365 * @dev: Device to prepare
366 * @return 0 if ok, -ve on error
367 */
368int blk_prepare_device(struct udevice *dev);
369
370/**
371 * blk_unbind_all() - Unbind all device of the given interface type
372 *
373 * The devices are removed and then unbound.
374 *
375 * @if_type: Interface type to unbind
376 * @return 0 if OK, -ve on error
377 */
378int blk_unbind_all(int if_type);
379
Simon Glass52138fd2016-05-01 11:36:28 -0600380/**
381 * blk_find_max_devnum() - find the maximum device number for an interface type
382 *
383 * Finds the last allocated device number for an interface type @if_type. The
384 * next number is safe to use for a newly allocated device.
385 *
386 * @if_type: Interface type to scan
387 * @return maximum device number found, or -ENODEV if none, or other -ve on
388 * error
389 */
390int blk_find_max_devnum(enum if_type if_type);
391
Simon Glasscd0fb552016-05-01 13:52:30 -0600392/**
393 * blk_select_hwpart() - select a hardware partition
394 *
395 * Select a hardware partition if the device supports it (typically MMC does)
396 *
397 * @dev: Device to update
398 * @hwpart: Partition number to select
399 * @return 0 if OK, -ve on error
400 */
401int blk_select_hwpart(struct udevice *dev, int hwpart);
402
Tom Rini4bdb49a2017-06-10 10:01:05 -0400403/**
404 * blk_get_from_parent() - obtain a block device by looking up its parent
405 *
406 * All devices with
407 */
408int blk_get_from_parent(struct udevice *parent, struct udevice **devp);
409
Simon Glass09d71aa2016-02-29 15:25:55 -0700410#else
411#include <errno.h>
Simon Glass2a981dc2016-02-29 15:25:52 -0700412/*
413 * These functions should take struct udevice instead of struct blk_desc,
414 * but this is convenient for migration to driver model. Add a 'd' prefix
415 * to the function operations, so that blk_read(), etc. can be reserved for
416 * functions with the correct arguments.
417 */
418static inline ulong blk_dread(struct blk_desc *block_dev, lbaint_t start,
419 lbaint_t blkcnt, void *buffer)
420{
Eric Nelsone40cf342016-03-28 10:05:44 -0700421 ulong blks_read;
422 if (blkcache_read(block_dev->if_type, block_dev->devnum,
423 start, blkcnt, block_dev->blksz, buffer))
424 return blkcnt;
425
Simon Glass2a981dc2016-02-29 15:25:52 -0700426 /*
427 * We could check if block_read is NULL and return -ENOSYS. But this
428 * bloats the code slightly (cause some board to fail to build), and
429 * it would be an error to try an operation that does not exist.
430 */
Eric Nelsone40cf342016-03-28 10:05:44 -0700431 blks_read = block_dev->block_read(block_dev, start, blkcnt, buffer);
432 if (blks_read == blkcnt)
433 blkcache_fill(block_dev->if_type, block_dev->devnum,
434 start, blkcnt, block_dev->blksz, buffer);
435
436 return blks_read;
Simon Glass2a981dc2016-02-29 15:25:52 -0700437}
438
439static inline ulong blk_dwrite(struct blk_desc *block_dev, lbaint_t start,
440 lbaint_t blkcnt, const void *buffer)
441{
Eric Nelsone40cf342016-03-28 10:05:44 -0700442 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
Simon Glass2a981dc2016-02-29 15:25:52 -0700443 return block_dev->block_write(block_dev, start, blkcnt, buffer);
444}
445
446static inline ulong blk_derase(struct blk_desc *block_dev, lbaint_t start,
447 lbaint_t blkcnt)
448{
Eric Nelsone40cf342016-03-28 10:05:44 -0700449 blkcache_invalidate(block_dev->if_type, block_dev->devnum);
Simon Glass2a981dc2016-02-29 15:25:52 -0700450 return block_dev->block_erase(block_dev, start, blkcnt);
451}
Simon Glass6eef6ea2016-05-01 11:36:03 -0600452
453/**
454 * struct blk_driver - Driver for block interface types
455 *
456 * This provides access to the block devices for each interface type. One
457 * driver should be provided using U_BOOT_LEGACY_BLK() for each interface
458 * type that is to be supported.
459 *
460 * @if_typename: Interface type name
461 * @if_type: Interface type
462 * @max_devs: Maximum number of devices supported
463 * @desc: Pointer to list of devices for this interface type,
464 * or NULL to use @get_dev() instead
465 */
466struct blk_driver {
467 const char *if_typename;
468 enum if_type if_type;
469 int max_devs;
470 struct blk_desc *desc;
471 /**
472 * get_dev() - get a pointer to a block device given its number
473 *
474 * Each interface allocates its own devices and typically
475 * struct blk_desc is contained with the interface's data structure.
476 * There is no global numbering for block devices. This method allows
477 * the device for an interface type to be obtained when @desc is NULL.
478 *
479 * @devnum: Device number (0 for first device on that interface,
480 * 1 for second, etc.
481 * @descp: Returns pointer to the block device on success
482 * @return 0 if OK, -ve on error
483 */
484 int (*get_dev)(int devnum, struct blk_desc **descp);
485
486 /**
487 * select_hwpart() - Select a hardware partition
488 *
489 * Some devices (e.g. MMC) can support partitioning at the hardware
490 * level. This is quite separate from the normal idea of
491 * software-based partitions. MMC hardware partitions must be
492 * explicitly selected. Once selected only the region of the device
493 * covered by that partition is accessible.
494 *
495 * The MMC standard provides for two boot partitions (numbered 1 and 2),
496 * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
497 * Partition 0 is the main user-data partition.
498 *
499 * @desc: Block device descriptor
500 * @hwpart: Hardware partition number to select. 0 means the main
501 * user-data partition, 1 is the first partition, 2 is
502 * the second, etc.
503 * @return 0 if OK, other value for an error
504 */
505 int (*select_hwpart)(struct blk_desc *desc, int hwpart);
506};
507
508/*
509 * Declare a new U-Boot legacy block driver. New drivers should use driver
510 * model (UCLASS_BLK).
511 */
512#define U_BOOT_LEGACY_BLK(__name) \
513 ll_entry_declare(struct blk_driver, __name, blk_driver)
514
515struct blk_driver *blk_driver_lookup_type(int if_type);
516
Simon Glass09d71aa2016-02-29 15:25:55 -0700517#endif /* !CONFIG_BLK */
Simon Glass2a981dc2016-02-29 15:25:52 -0700518
Simon Glass6eef6ea2016-05-01 11:36:03 -0600519/**
520 * blk_get_devnum_by_typename() - Get a block device by type and number
521 *
522 * This looks through the available block devices of the given type, returning
523 * the one with the given @devnum.
524 *
525 * @if_type: Block device type
526 * @devnum: Device number
527 * @return point to block device descriptor, or NULL if not found
528 */
529struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum);
530
531/**
532 * blk_get_devnum_by_type() - Get a block device by type name, and number
533 *
534 * This looks up the block device type based on @if_typename, then calls
535 * blk_get_devnum_by_type().
536 *
537 * @if_typename: Block device type name
538 * @devnum: Device number
539 * @return point to block device descriptor, or NULL if not found
540 */
541struct blk_desc *blk_get_devnum_by_typename(const char *if_typename,
542 int devnum);
543
544/**
545 * blk_dselect_hwpart() - select a hardware partition
546 *
547 * This selects a hardware partition (such as is supported by MMC). The block
548 * device size may change as this effectively points the block device to a
549 * partition at the hardware level. See the select_hwpart() method above.
550 *
551 * @desc: Block device descriptor for the device to select
552 * @hwpart: Partition number to select
553 * @return 0 if OK, -ve on error
554 */
555int blk_dselect_hwpart(struct blk_desc *desc, int hwpart);
556
557/**
558 * blk_list_part() - list the partitions for block devices of a given type
559 *
560 * This looks up the partition type for each block device of type @if_type,
561 * then displays a list of partitions.
562 *
563 * @if_type: Block device type
564 * @return 0 if OK, -ENODEV if there is none of that type
565 */
566int blk_list_part(enum if_type if_type);
567
568/**
569 * blk_list_devices() - list the block devices of a given type
570 *
571 * This lists each block device of the type @if_type, showing the capacity
572 * as well as type-specific information.
573 *
574 * @if_type: Block device type
575 */
576void blk_list_devices(enum if_type if_type);
577
578/**
579 * blk_show_device() - show information about a given block device
580 *
581 * This shows the block device capacity as well as type-specific information.
582 *
583 * @if_type: Block device type
584 * @devnum: Device number
585 * @return 0 if OK, -ENODEV for invalid device number
586 */
587int blk_show_device(enum if_type if_type, int devnum);
588
589/**
590 * blk_print_device_num() - show information about a given block device
591 *
592 * This is similar to blk_show_device() but returns an error if the block
593 * device type is unknown.
594 *
595 * @if_type: Block device type
596 * @devnum: Device number
597 * @return 0 if OK, -ENODEV for invalid device number, -ENOENT if the block
598 * device is not connected
599 */
600int blk_print_device_num(enum if_type if_type, int devnum);
601
602/**
603 * blk_print_part_devnum() - print the partition information for a device
604 *
605 * @if_type: Block device type
606 * @devnum: Device number
607 * @return 0 if OK, -ENOENT if the block device is not connected, -ENOSYS if
608 * the interface type is not supported, other -ve on other error
609 */
610int blk_print_part_devnum(enum if_type if_type, int devnum);
611
612/**
613 * blk_read_devnum() - read blocks from a device
614 *
615 * @if_type: Block device type
616 * @devnum: Device number
617 * @blkcnt: Number of blocks to read
618 * @buffer: Address to write data to
619 * @return number of blocks read, or -ve error number on error
620 */
621ulong blk_read_devnum(enum if_type if_type, int devnum, lbaint_t start,
622 lbaint_t blkcnt, void *buffer);
623
624/**
625 * blk_write_devnum() - write blocks to a device
626 *
627 * @if_type: Block device type
628 * @devnum: Device number
629 * @blkcnt: Number of blocks to write
630 * @buffer: Address to read data from
631 * @return number of blocks written, or -ve error number on error
632 */
633ulong blk_write_devnum(enum if_type if_type, int devnum, lbaint_t start,
634 lbaint_t blkcnt, const void *buffer);
635
636/**
637 * blk_select_hwpart_devnum() - select a hardware partition
638 *
639 * This is similar to blk_dselect_hwpart() but it looks up the interface and
640 * device number.
641 *
642 * @if_type: Block device type
643 * @devnum: Device number
644 * @hwpart: Partition number to select
645 * @return 0 if OK, -ve on error
646 */
647int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart);
648
Simon Glass6faa4ed2017-07-29 11:34:53 -0600649/**
650 * blk_get_if_type_name() - Get the name of an interface type
651 *
652 * @if_type: Interface type to check
653 * @return name of interface, or NULL if none
654 */
655const char *blk_get_if_type_name(enum if_type if_type);
656
Simon Glass4395f662017-07-29 11:34:54 -0600657/**
658 * blk_common_cmd() - handle common commands with block devices
659 *
660 * @args: Number of arguments to the command (argv[0] is the command itself)
661 * @argv: Command arguments
662 * @if_type: Interface type
663 * @cur_devnump: Current device number for this interface type
664 * @return 0 if OK, CMD_RET_ERROR on error
665 */
666int blk_common_cmd(int argc, char * const argv[], enum if_type if_type,
667 int *cur_devnump);
668
Simon Glass1a736612016-02-29 15:25:39 -0700669#endif